The arc plate permeable breakwater has gradually attracted attention and research due to its advantages of simple structure,low cost,short construction period and strong ability to adapt to the external environment.Opening on an arc plate permeable breakwater is beneficial to further improve its wave dissipation performance.The wave dissipation performance of an arc plate breakwater under different opening methods is studied through physical model tests.According to the opening position and opening shape,opening methods can be divided into circular openings on the wave-facing side,square openings on the wave-facing side,circular openings on the wave-back side,and square openings on the wave-back side.Physical model tests are carried out under different diving depths (-0.03 m,0 m,0.03 m),wave periods (1.2 s,1.4 s,1.6 s,1.8 s,2.0 s) and wave heights (0.06 m,0.10 m) to study the transmittance and reflection coefficients of arc plate permeable breakwaters with different opening methods,and to analyze their wave dissipation performance.The results show that when the submergence depth of the arc plate permeable breakwater is -0.03 m,the square hole is conducive to improving the wave dissipation performance of the arc plate permeable breakwater.When the submergence depth of the arc plate permeable breakwater is 0.03 m,compared with other opening methods,the square hole on the wave-facing side can significantly improve the wave dissipation performance of the arc plate permeable breakwater.